Pomegranate is one of the nicest fruit trees and perhaps the easiest to grow in pots because it has shallow root system when compared to other fruit trees.

Pomegranate tree if grown
under optimal conditions, live up to 200 years. It is native to Middle East
(Iran) and South Asia. It is a shrub or small tree that might grow up to 6 m
(20 ft) but usually reduced to 2 m.